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Table 1 The frequency of hormonal measurements of the study

From: Joint effect of particulate matter and cigarette smoke on women’s sex hormones

Phases Mid-follicular Late follicular Ovulatory Early luteal Mid-luteal
Days of the cycle − 9 − 8 − 7 − 6 − 5 − 4 − 3 − 2 − 1 0 1 2 3 4 5 6 7 8
Estradiol (E2) measurements X X X X X X X X X X X X X X X X X X
Progesterone (P) measurements             X X X X X X X
E2/P ratio calculations             X X X X X X X
  1. The “X” represents the day of sample collection or E2/P ratio calculation